56957218 has 8 divisors (see below), whose sum is σ = 88381980. Its totient is φ = 27496560.

The previous prime is 56957213. The next prime is 56957221. The reversal of 56957218 is 81275965.

It can be written as a sum of positive squares in 2 ways, for example, as 56957209 + 9 = 7547^2 + 3^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (56957213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490953 + ... + 491068.

Almost surely, 2^56957218 is an apocalyptic number.

56957218 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

56957218 is a deficient number, since it is larger than the sum of its proper divisors (31424762).

56957218 is a wasteful number, since it uses less digits than its factorization.

56957218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982052.

The product of its digits is 151200, while the sum is 43.

The square root of 56957218 is about 7547.0005962634. Note that the first 3 decimals coincide. The cubic root of 56957218 is about 384.7538044815.

It can be divided in two parts, 56957 and 218, that added together give a palindrome (57175).

The spelling of 56957218 in words is "fifty-six million, nine hundred fifty-seven thousand, two hundred eighteen".